Method for determining quality of measurement in a radar level gauge system

Abstract: A method for determining a quality of measurement in a radar level gauge system arranged to measure a filling level of a content contained in a tank, comprising the steps of providing an antenna having at least two separate antenna functions, including a transmitting function and a receiving function, transmitting microwave energy from said transmitting function of said antenna, receiving a reflected part of said microwave energy, reflected from said level of content to be gauged, using said receiving function of said antenna, detecting a leakage signal, said leakage signal leaking from said transmitting function of said antenna to said receiving function of said antenna, and determining, based on a relationship between said leakage signal and said reflected signal, a level of quality of said reflected signal. An advantage with the above method is its improved accuracy when determining the level of quality, since there is no need for a separate reference reflection point. (end of abstract)